Water-tube boiler.



No. 639,507. Patented Dec. l9, I899.

H. BLE SSINGEB. WATER TUBE BOILER.

(Application flled Sept. 2, 1899.)

(No Modal.)

' NITE TATES I-IERMANN BLESSINGER, O F MAGDEBURG, GERMANY,

WATER-TUBE BOILER.

SPECIFICATION forming part of Letters Patent No. 639,507. dated December19, 1899;

Application filed September 2, 1899. Serial No. 729,363. (No model.)

To all whom it may concern:

Be it known that I, HERMANN BLESSINGER, a subject of the Emperor ofGermany and King of Prussia, and a resident of the city of Magdeburg, inthe Province of Saxony and Empire of Germany, have invented certainImprovements in Water-Tube Boilers, of which the following is aspecification.

My invention relates to improvements in water-tube boilers, and has forits objects the promotion of a more effectual circulation of the wholeof the water in such boilers and the conveyance of the greater portionof the steam as fast as generated into the steam drum apart from thewater from which it has been formed, thereby obtaining a greaterefficiency of the boilers than has hitherto been the case with those atpresent made and used.

It is well known with all water-tube boilers now in practical use thatthe steam in passing from the tubes to the water-chamber and from thencerising to the steanrdrum does not have a sufficiently free passage byreason of the narrow limits that the connecting-tube between thewater-chamber and the steamdrumis necessarily confined relatively to thesize of the said water-chamber, the consequence being the generatedsteam and the circulationot the water is impeded, to obviate which isthe purpose of my invention.

In order to enable my invention to be more clearly understood, Ihereunto append one sheet of drawings, in which- Figure 1 is a verticalsection, partly broken away, of a water-tube boiler with my saidimprovement-s shown attached thereto, while Fig. 2 is a front sectionalelevation of the same.

The essential feature of my invention is that above the two lowermostranges of tubes A (which being exposed directly above the furnacegenerate by far the greater amount of steam) a suitably-disposedbaffle-plate B, reaching approximately to the center of thewater-chamber O, is riveted or otherwise fixed to the said Water-chamberin such a manner that the mixture of water and steam upon discharge fromthe said tubes A impinges upon the baflie-plate B, which while allowingthe water to flow freely by through apertures D, formed therein,intercepts the steam and conveys the same along its upper surface to thesteam-drum E, through the pipes or tubes F F, arranged laterally orotherwise, the water after passing the plate B being free to rise alongthe front surface of the water-chamber C in the usual Way. As the steamin the remaining tubes A cannot, however, be affected by thebaflie-plate B by reason of their position above it, twodownwardly-depending baffle-plates G G are suitably riveted or otherwisefixed to the top of the Water-chamber O and form a prolongation of theconnecting-tube H, so that the steam discharged from the said tubes A ateach side of the baffle-plates G G is thereby intercepted and conveyedseparately through the tubes J J, fixed to the top of the Waterchamber 0and opening into the before men tioned tubes F F to the steam-drum E, asin the case of the steam from the tubes A, from which it will be seenthat it is only the steam generated by that portion of the tubes A whichare situated immediately below the baffle-plates G G and connecting-tubeH that enters the steam-dru m E through the said tube 11 with thecirculating water; but as this is only a small fraction of the totalvolume of steam generated, being but one-sixth to one.- eighth of same,it suffers no impeding eifect, but,on the contrary, accelerates thewhole circulation of the water throughout the boiler.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is tobe perform ed, I declare thatwhat I claim is- V 1. In a water-tube boiler, the combination With asteam-drum, of an upper set of tubes; a header to which said tubes areconnected; means for separating the steam generated in said upper tubesfrom the water; means for conveying said separated steam directly tosaid steam-drumg a lower set of tubes connected at one end to saidheader, the lower portion of said header being provided with means forseparating the steam from the Water 5 and means for conveying the steamfrom said tubes directly to said steam-drum, substantially as described.

2. In a Water-tube boiler, the combination with a stea m-drum, of anupper set of tubes below said drum connected to a header, said headerbeing provided with steam and Water connections to said drum, and alower set of tubes connected at one end to said header,

the lower portion of said header being provided with means forseparating the steam from the water and conveying the steam from saidlower tubes directly to said drum, sub- ,stantially as described.

3. In a water-tube boiler, the combination with a steam-drum, of anupper set of tubes connected at one end to a header, a connectionbetween the bottom of said drum and the top of said header and conduitsleading from the side of said drum to the top of said header,baffle-plates extending across said header below said connection, and alower set of tubes having steam and water connections to said drum,substantially as described.

4. In. a water-tube boiler, the combination with a steam-drum, of anupper set of tubes connected at one end to a header said header havingseparate steam and waterconnections to said drum, and a lower set oftubes connected to said header, and baffle-plates running longitudinallyof the lower portion of said header and inclosing the space around theyends. of said lower set of tubes, and having steam-pipes for conductingthe steam from beneath said baiile-plates to said steamdrum, saidbaffle-plates having apertures for the escape of the heated water,substantially as described.

5. In a water-tube boiler, thecombination with a steam-drum, of an upperset of tubes connected at one end to a header, a connec- 'tion betweenthe bottom of said drum and said header, and conduits leading from theside of said drum to the top of said header, baffleplates extendingtransversely across said header below said connection, a lower set oftubes connected to said header, and loaflleplates running longitudinallyof the lower portion of said header partially inclosing the space aroundthe ends of said lower set of tubes, and conduits for conducting thesteam from beneath said baffie-plates to said steamdrum, substantiallyas described.

In testimony whereof I, have signed my name to this specification inthe. presence of two subscribing witnesses.

HERMANN BLESSI-NGER.

Witnesses:

F. T. STEPHAN, PAUL Mi'ILLER.

